55663882305421 has 4 divisors (see below), whose sum is σ = 59945719405852. Its totient is φ = 51382045204992.

The previous prime is 55663882305379. The next prime is 55663882305431. The reversal of 55663882305421 is 12450328836655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29660114132100 + 26003768173321 = 5446110^2 + 5099389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55663882305421 is a prime.

It is a super-2 number, since 2×55663882305421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55663882305431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2140918550196 + ... + 2140918550221.

It is an arithmetic number, because the mean of its divisors is an integer number (14986429851463).

Almost surely, 2^{55663882305421} is an apocalyptic number.

It is an amenable number.

55663882305421 is a deficient number, since it is larger than the sum of its proper divisors (4281837100431).

55663882305421 is a wasteful number, since it uses less digits than its factorization.

55663882305421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281837100430.

The product of its (nonzero) digits is 41472000, while the sum is 58.

The spelling of 55663882305421 in words is "fifty-five trillion, six hundred sixty-three billion, eight hundred eighty-two million, three hundred five thousand, four hundred twenty-one".